bitmap.cpp
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bitmap.cpp
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	#include "util/funcs.h"
	#include "util/debug.h"
	#include "util/system.h"
	#include "util/init.h"
	#include "hqx.h"
	#include "xbr.h"
	#include "sprig/sprig.h"
	#include "stretch/SDL_stretch.h"
	#include <SDL.h>
	#include "image/SDL_image.h"
	#include "image/IMG_savepng.h"
	#include <math.h>
	#include "util/exceptions/exception.h"
	#include <string>
	#include <sstream>

	namespace Graphics{

	static const int WINDOWED = 0;
	static const int FULLSCREEN = 1;
	/* bits per pixel */
	static int SCREEN_DEPTH = 16;
	static SDL_Surface * screen;

	static SDL_PixelFormat format565;

	/* FIXME: try to get rid of these two variables */
	/*
	static int SCALE_X;
	static int SCALE_Y;
	*/

	typedef unsigned int (*blender)(unsigned int color1, unsigned int color2, unsigned int alpha);

	/* taken from allegro 4.2: src/colblend.c, _blender_trans16 */
	/* this function performs a psuedo-SIMD operation on the pixel
	* components in RGB 5-6-5 format. To get this to work for some
	* other format probably all that needs to happen is to change
	* the 0x7E0F81F constant to something else. 5-5-5:
	* binary: 0011 1110 000 0111 1100 0001 1111
	* hex: 0x174076037
	*/
	static inline unsigned int transBlender(unsigned int x, unsigned int y, unsigned int n){
	unsigned long result;

	if (n)
	n = (n + 1) / 8;

	/* hex: 0x7E0F81F
	* binary: 0111 1110 0000 1111 1000 0001 1111
	*/
	x = ((x & 0xFFFF) \| (x << 16)) & 0x7E0F81F;
	y = ((y & 0xFFFF) \| (y << 16)) & 0x7E0F81F;

	result = ((x - y) * n / 32 + y) & 0x7E0F81F;

	return ((result & 0xFFFF) \| (result >> 16));
	}

	static inline unsigned int multiplyBlender(unsigned int x, unsigned int y, unsigned int n){
	Uint8 redX = 0;
	Uint8 greenX = 0;
	Uint8 blueX = 0;
	SDL_GetRGB(x, &format565, &redX, &greenX, &blueX);
	Uint8 redY = 0;
	Uint8 greenY = 0;
	Uint8 blueY = 0;
	SDL_GetRGB(y, &format565, &redY, &greenY, &blueY);

	int r = redX * redY / 256;
	int g = greenX * greenY / 256;
	int b = blueX * blueY / 256;
	return transBlender(makeColor(r, g, b).color, y, n);
	}

	static inline unsigned int alphaBlender(unsigned int x, unsigned int y, unsigned int n){
	Uint8 source = n >> 8;
	Uint8 dest = n & 0xff;

	/*
	unsigned long result;

	x = ((x & 0xFFFF) \| (x << 16)) & 0x7E0F81F;
	y = ((y & 0xFFFF) \| (y << 16)) & 0x7E0F81F;

	result = ((x * source / 255) + (y * dest / 255)) & 0x7E0F81F;

	return ((result & 0xFFFF) \| (result >> 16));
	*/

	Uint8 redX = 0;
	Uint8 greenX = 0;
	Uint8 blueX = 0;
	SDL_GetRGB(x, &format565, &redX, &greenX, &blueX);
	Uint8 redY = 0;
	Uint8 greenY = 0;
	Uint8 blueY = 0;
	SDL_GetRGB(y, &format565, &redY, &greenY, &blueY);

	int r = (redY * dest + redX * source) / 256;
	int g = (greenY * dest + greenX * source) / 256;
	int b = (blueY * dest + blueX * source) / 256;

	r = Util::min(r, 255);
	g = Util::min(g, 255);
	b = Util::min(b, 255);

	// return transBlender(makeColor(r, g, b), y, dest);

	return makeColor(r, g, b).color;
	// return y;
	}

	static inline unsigned int addBlender(unsigned int x, unsigned int y, unsigned int n){
	Uint8 redX = 0;
	Uint8 greenX = 0;
	Uint8 blueX = 0;
	SDL_GetRGB(x, &format565, &redX, &greenX, &blueX);
	Uint8 redY = 0;
	Uint8 greenY = 0;
	Uint8 blueY = 0;
	SDL_GetRGB(y, &format565, &redY, &greenY, &blueY);

	int r = redY + redX * n / 256;
	int g = greenY + greenX * n / 256;
	int b = blueY + blueX * n / 256;

	r = Util::min(r, 255);
	g = Util::min(g, 255);
	b = Util::min(b, 255);

	return makeColor(r, g, b).color;
	}

	static inline int iabs(int x){
	return x < 0 ? -x : x;
	}

	static inline unsigned int differenceBlender(unsigned int x, unsigned int y, unsigned int n){
	Uint8 redX = 0;
	Uint8 greenX = 0;
	Uint8 blueX = 0;
	SDL_GetRGB(x, &format565, &redX, &greenX, &blueX);
	Uint8 redY = 0;
	Uint8 greenY = 0;
	Uint8 blueY = 0;
	SDL_GetRGB(y, &format565, &redY, &greenY, &blueY);

	// int r = iabs(redY - redX);
	// int g = iabs(greenY - greenX);
	// int b = iabs(blueY - blueX);
	int r = redY - redX;
	int g = greenY - greenX;
	int b = blueY - blueX;
	if (r < 0){
	r = 0;
	}
	if (g < 0){
	g = 0;
	}
	if (b < 0){
	b = 0;
	}
	return transBlender(makeColor(r, g, b).color, y, n);
	}

	static inline unsigned int burnBlender(unsigned int x, unsigned int y, unsigned int n){
	Uint8 redX = 0;
	Uint8 greenX = 0;
	Uint8 blueX = 0;
	SDL_GetRGB(x, &format565, &redX, &greenX, &blueX);
	Uint8 redY = 0;
	Uint8 greenY = 0;
	Uint8 blueY = 0;
	SDL_GetRGB(y, &format565, &redY, &greenY, &blueY);

	int r = redX - redY;
	int g = greenX - greenY;
	int b = blueX - blueY;
	if (r < 0){
	r = 0;
	}
	if (g < 0){
	g = 0;
	}
	if (b < 0){
	g = 0;
	}
	return transBlender(makeColor(r, g, b).color, y, n);
	}

	static inline unsigned int noBlender(unsigned int a, unsigned int b, unsigned int c){
	return a;
	}

	struct BlendingData{
	BlendingData():
	red(0), green(0), blue(0), alpha(0), currentBlender(noBlender){}

	int red, green, blue, alpha;
	blender currentBlender;
	};

	BitmapData::~BitmapData(){
	if (surface != NULL && destroy){
	SDL_FreeSurface(surface);
	}
	}

	static BlendingData globalBlend;
	// static int drawingMode = Bitmap::MODE_SOLID;

	/*
	static int drawingAlpha(){
	if (drawingMode == Bitmap::MODE_SOLID){
	return 255;
	}
	if (drawingMode == Bitmap::MODE_TRANS){
	return globalBlend.alpha;
	}
	return 255;
	}
	*/

	static void paintown_applyTrans16(SDL_Surface * dst, const int color);
	static void paintown_replace16(SDL_Surface * dst, const int original, const int replace);
	static void paintown_draw_sprite_ex16(SDL_Surface * dst, SDL_Surface * src, long long dx, long long dy, int mode, int flip, Bitmap::Filter * filter);
	static void paintown_draw_sprite_filter_ex16(SDL_Surface * dst, SDL_Surface * src, long long x, long long y, Bitmap::Filter * filter);
	static void paintown_light16(SDL_Surface * dst, const int x, const int y, int width, int height, const int start_y, const int focus_alpha, const int edge_alpha, const int focus_color, const int edge_color);

	Color MaskColor(){
	static Color mask = makeColor(255, 0, 255);
	return mask;
	}

	static SDL_Surface * optimizedSurface(SDL_Surface * in){
	/* SDL_DisplayFormat will return 0 if a graphics context is not set,
	* like if a test is running instead of the real game.
	*/
	// SDL_Surface * out = SDL_DisplayFormat(in);
	SDL_Surface * out = SDL_ConvertSurface(in, &format565, SDL_SWSURFACE);
	if (out == NULL){
	// out = SDL_CreateRGBSurface(SDL_SWSURFACE, in->w, in->h, in->format->BitsPerPixel, 0, 0, 0, 0);
	out = SDL_CreateRGBSurface(SDL_SWSURFACE, in->w, in->h, SCREEN_DEPTH, format565.Rmask, format565.Gmask, format565.Bmask, format565.Amask);
	if (out == NULL){
	std::ostringstream out;
	out << "Could not create RGB surface of size " << in->w << ", " << in->h << ". Memory usage: " << System::memoryUsage();
	throw BitmapException(__FILE__, __LINE__, out.str());
	}
	SDL_Rect source;
	SDL_Rect destination;
	source.w = in->w;
	source.h = in->h;
	source.x = 0;
	source.y = 0;

	destination.w = in->w;
	destination.h = in->h;
	destination.x = 0;
	destination.y = 0;

	SDL_BlitSurface(in, &source, out, &destination);
	}
	return out;
	}

	static Bitmap * Scaler = NULL;

	BitmapData::BitmapData(SDL_Surface * surface):
	surface(surface),
	destroy(true){
	setSurface(surface);
	}

	void BitmapData::setSurface(SDL_Surface * surface){
	this->surface = surface;
	clip_left = 0;
	clip_top = 0;
	if (surface){
	clip_right = surface->w;
	clip_bottom = surface->h;
	} else {
	clip_right = 0;
	clip_bottom = 0;
	}
	}

	Bitmap::Bitmap():
	mustResize(false),
	bit8MaskColor(0){
	int width = 1;
	int height = 1;
	SDL_Surface * surface = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, SCREEN_DEPTH, format565.Rmask, format565.Gmask, format565.Bmask, format565.Amask);
	setData(Util::ReferenceCount<BitmapData>(new BitmapData(surface)));
	}

	Bitmap::Bitmap(const char * data, int length):
	mustResize(false),
	bit8MaskColor(0){
	loadFromMemory(data, length);
	}

	Bitmap::Bitmap(SDL_Surface * who, bool deep_copy):
	mustResize(false),
	bit8MaskColor(0){
	if (deep_copy){
	SDL_Surface * surface = SDL_CreateRGBSurface(SDL_SWSURFACE, who->w, who->h, SCREEN_DEPTH, format565.Rmask, format565.Gmask, format565.Bmask, format565.Amask);
	SDL_Rect source;
	SDL_Rect destination;
	source.w = surface->w;
	source.h = surface->h;
	source.x = 0;
	source.y = 0;

	destination.w = surface->w;
	destination.h = surface->h;
	destination.x = 0;
	destination.y = 0;

	SDL_BlitSurface(who, &source, surface, &destination);
	setData(Util::ReferenceCount<BitmapData>(new BitmapData(surface)));
	} else {
	setData(Util::ReferenceCount<BitmapData>(new BitmapData(who)));
	}
	}

	Bitmap::Bitmap(int w, int h):
	mustResize(false),
	bit8MaskColor(0){
	if (w < 1){
	w = 1;
	}
	if (h < 1){
	h = 1;
	}
	SDL_Surface * surface = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, SCREEN_DEPTH, format565.Rmask, format565.Gmask, format565.Bmask, format565.Amask);
	if (surface == NULL){
	std::ostringstream out;
	out << "Could not create surface with dimensions " << w << ", " << h;
	throw BitmapException(__FILE__, __LINE__, out.str());
	}
	setData(Util::ReferenceCount<BitmapData>(new BitmapData(surface)));
	}

	Bitmap::Bitmap( const char * load_file ):
	mustResize(false),
	bit8MaskColor(0){
	internalLoadFile(load_file);
	}

	Bitmap::Bitmap( const std::string & load_file ):
	mustResize(false){
	internalLoadFile(load_file.c_str());
	}

	Bitmap::Bitmap( const char * load_file, int sx, int sy ):
	mustResize(false),
	bit8MaskColor(0){
	Bitmap temp(load_file);
	SDL_Surface * surface = SDL_CreateRGBSurface(SDL_SWSURFACE, sx, sy, SCREEN_DEPTH, format565.Rmask, format565.Gmask, format565.Bmask, format565.Amask);
	setData(Util::ReferenceCount<BitmapData>(new BitmapData(surface)));

	temp.Stretch(*this);
	}

	/* unused */
	Bitmap::Bitmap( const char * load_file, int sx, int sy, double accuracy ):
	mustResize(false),
	bit8MaskColor(0){
	throw BitmapException(__FILE__, __LINE__, "Unimplemented constructor");
	}

	Bitmap::Bitmap( const Bitmap & copy, bool deep_copy):
	mustResize(false),
	bit8MaskColor(copy.bit8MaskColor){
	if (deep_copy){
	SDL_Surface * who = copy.getData()->getSurface();
	SDL_Surface * surface = SDL_CreateRGBSurface(SDL_SWSURFACE, who->w, who->h, SCREEN_DEPTH, format565.Rmask, format565.Gmask, format565.Bmask, format565.Amask);
	SDL_Rect source;
	SDL_Rect destination;
	source.w = surface->w;
	source.h = surface->h;
	source.x = 0;
	source.y = 0;

	destination.w = surface->w;
	destination.h = surface->h;
	destination.x = 0;
	destination.y = 0;

	SDL_BlitSurface(who, &source, surface, &destination);
	setData(Util::ReferenceCount<BitmapData>(new BitmapData(surface)));
	} else {
	setData(copy.getData());
	}
	}

	Bitmap::Bitmap( const Bitmap & copy, int sx, int sy ):
	mustResize(false),
	bit8MaskColor(copy.bit8MaskColor){
	/* TODO */
	}

	Bitmap::Bitmap( const Bitmap & copy, int sx, int sy, double accuracy ):
	mustResize(false),
	bit8MaskColor(copy.bit8MaskColor){
	/* TODO */
	}

	void Bitmap::loadFromMemory(const char * data, int length){
	SDL_RWops * ops = SDL_RWFromConstMem(data, length);
	SDL_Surface * loaded = IMG_Load_RW(ops, 1);
	if (loaded){
	setData(Util::ReferenceCount<BitmapData>(new BitmapData(optimizedSurface(loaded))));
	SDL_FreeSurface(loaded);
	} else {
	std::ostringstream out;
	out << "Could not load surface from memory " << (void*) data << " length " << length;
	throw BitmapException(__FILE__, __LINE__, out.str());
	}

	}

	static inline Uint8* computeOffset(SDL_Surface * surface, int x, int y){
	int bpp = surface->format->BytesPerPixel;
	return ((Uint8)surface->pixels) + y surface->pitch + x * bpp;
	}

	Bitmap::Bitmap( const Bitmap & copy, int x, int y, int width, int height ):
	mustResize(false),
	bit8MaskColor(copy.bit8MaskColor){
	path = copy.getPath();
	SDL_Surface * his = copy.getData()->getSurface();
	if (x < 0)
	x = 0;
	if (y < 0)
	y = 0;

	if (width < 1 \|\| height < 1){
	std::ostringstream out;
	out << "Attempting to create a sub-bitmap.";
	if (width < 1){
	out << " Width was less than 1: " << width;
	}
	if (height < 1){
	out << " Height was less than 1: " << height;
	}
	throw BitmapException(__FILE__, __LINE__, out.str());
	}
	if (width + x > his->w )
	width = his->w - x;
	if (height + y > his->h)
	height = his->h - y;

	SDL_Surface * sub = SDL_CreateRGBSurfaceFrom(computeOffset(his, x, y), width, height, SCREEN_DEPTH, his->pitch, format565.Rmask, format565.Gmask, format565.Bmask, format565.Amask);
	setData(Util::ReferenceCount<BitmapData>(new BitmapData(sub)));
	}

	void Bitmap::internalLoadFile(const char * path){
	this->path = path;
	SDL_Surface * loaded = IMG_Load(path);
	if (loaded){
	setData(Util::ReferenceCount<BitmapData>(new BitmapData(optimizedSurface(loaded))));
	SDL_FreeSurface(loaded);
	} else {
	std::ostringstream out;
	out << "Could not load file '" << path << "'";
	throw BitmapException(__FILE__, __LINE__, out.str());
	}
	}

	int Bitmap::getWidth() const {
	if (getData()->getSurface() != NULL){
	return getData()->getSurface()->w;
	}

	return 0;
	}

	int Bitmap::getHeight() const {
	if (getData()->getSurface() != NULL){
	return getData()->getSurface()->h;
	}

	return 0;
	}

	int getRed(Color c){
	Uint8 red = 0;
	Uint8 green = 0;
	Uint8 blue = 0;
	SDL_GetRGB(c.color, &format565, &red, &green, &blue);
	return red;
	}

	int getBlue(Color c){
	Uint8 red = 0;
	Uint8 green = 0;
	Uint8 blue = 0;
	SDL_GetRGB(c.color, &format565, &red, &green, &blue);
	return blue;
	}

	int getGreen(Color c){
	Uint8 red = 0;
	Uint8 green = 0;
	Uint8 blue = 0;
	SDL_GetRGB(c.color, &format565, &red, &green, &blue);
	return green;
	}

	Color makeColor(int red, int blue, int green){
	return Color(SDL_MapRGB(&format565, red, blue, green));
	}

	void initializeExtraStuff(){
	/* this is as good a place as any to initialize our format */
	format565.palette = 0;
	format565.BitsPerPixel = 16;
	format565.BytesPerPixel = 2;
	format565.Rloss = 3;
	format565.Gloss = 2;
	format565.Bloss = 3;
	format565.Aloss = 0;
	format565.Rshift = 11;
	format565.Gshift = 5;
	format565.Bshift = 0;
	format565.Ashift = 0;
	format565.Rmask = 63488;
	format565.Gmask = 2016;
	format565.Bmask = 31;
	format565.Amask = 0;
	#if !SDL_VERSION_ATLEAST(1, 3, 0)
	format565.colorkey = 0;
	format565.alpha = 255;
	#endif
	}

	/* This code isn't used but leave it here for reference */
	#ifdef PS3
	#include <rsx/rsx.h>
	#include <sysutil/video.h>
	void getNativePs3Resolution(int * width, int * height){
	videoState state;
	videoGetState(0,0,&state);
	videoResolution resolution;
	videoGetResolution(state.displayMode.resolution, &resolution);
	*height = resolution.height;
	/* preserve 640x480 aspect ratio */
	width = (int)((height) * 1.33333);
	}
	#endif

	int changeGraphicsMode(int mode, int width, int height){
	return setGraphicsMode(mode, width, height);
	}

	int setGraphicsMode(int mode, int width, int height){
	initializeExtraStuff();

	switch (mode){
	case WINDOWED : {
	// screen = SDL_SetVideoMode(width, height, SCREEN_DEPTH, SDL_HWSURFACE \| SDL_DOUBLEBUF \| SDL_RESIZABLE);
	screen = SDL_SetVideoMode(width, height, SCREEN_DEPTH, SDL_SWSURFACE \| SDL_RESIZABLE);
	SDL_ShowCursor(0);
	// screen = SDL_SetVideoMode(width, height, SCREEN_DEPTH, SDL_SWSURFACE \| SDL_DOUBLEBUF);
	if (!screen){
	return 1;
	}
	break;
	}
	case FULLSCREEN : {
	screen = SDL_SetVideoMode(width, height, SCREEN_DEPTH, SDL_HWSURFACE \| SDL_DOUBLEBUF \| SDL_FULLSCREEN);
	SDL_ShowCursor(0);
	// screen = SDL_SetVideoMode(width, height, SCREEN_DEPTH, SDL_SWSURFACE \| SDL_DOUBLEBUF);
	if (!screen){
	return 1;
	}
	break;
	}
	}

	Global::debug(1) << "SDL Screen format palette: " << screen->format->palette <<
	" bits per pixel: " << (int) screen->format->BitsPerPixel <<
	" bytes per pixel: " << (int) screen->format->BytesPerPixel <<
	" rloss: " << (int) screen->format->Rloss <<
	" gloss: " << (int) screen->format->Gloss <<
	" bloss: " << (int) screen->format->Bloss <<
	" aloss: " << (int) screen->format->Aloss <<
	" rshift: " << (int) screen->format->Rshift <<
	" gshift: " << (int) screen->format->Gshift <<
	" bshift: " << (int) screen->format->Bshift <<
	" ashift: " << (int) screen->format->Ashift <<
	" rmask: " << (int) screen->format->Rmask <<
	" gmask: " << (int) screen->format->Gmask <<
	" bmask: " << (int) screen->format->Bmask <<
	" amask: " << (int) screen->format->Amask <<
	#if !SDL_VERSION_ATLEAST(1, 3, 0)
	" colorkey: " << (int) screen->format->colorkey <<
	" alpha: " << (int) screen->format->alpha << std::endl;
	#else
	std::endl;
	#endif


	/*
	SCALE_X = width;
	SCALE_Y = height;
	*/

	/* does this need to be here? I think configuration will set SCALE_ */
	/*
	SCALE_X = 640;
	SCALE_Y = 480;
	*/

	if ( Screen != NULL ){
	delete Screen;
	Screen = NULL;
	}

	/*
	if ( Scaler != NULL ){
	delete Scaler;
	Scaler = NULL;
	}
	*/

	if (width != 0 && height != 0){
	Screen = new Bitmap(screen);
	/* don't destroy the screen */
	Screen->getData()->destroy = false;

	/* Scaler is re-used as the screen buffer so don't destroy it */
	if (Scaler == NULL){
	Scaler = new Bitmap(width, height);
	} else {
	Scaler->updateSize(width, height);
	}

	/*
	if ( width != 0 && height != 0 && (width != SCALE_X \|\| height != SCALE_Y) ){
	Scaler = new Bitmap(width, height);
	Buffer = new Bitmap(SCALE_X, SCALE_Y);
	}
	*/
	}

	for (std::vector<Bitmap*>::iterator it = needResize.begin(); it != needResize.end(); it++){
	Bitmap * who = *it;
	who->resize(width, height);
	}

	return 0;
	}

	Bitmap * getScreenBuffer(){
	return Scaler;
	}

	void Bitmap::shutdown(){
	delete Screen;
	Screen = NULL;
	delete Scaler;
	Scaler = NULL;
	}

	void Bitmap::addBlender( int r, int g, int b, int a ){
	globalBlend.red = r;
	globalBlend.green = g;
	globalBlend.blue = b;
	globalBlend.alpha = a;
	globalBlend.currentBlender = Graphics::addBlender;
	}

	void Bitmap::multiplyBlender( int r, int g, int b, int a ){
	globalBlend.red = r;
	globalBlend.green = g;
	globalBlend.blue = b;
	globalBlend.alpha = a;
	globalBlend.currentBlender = Graphics::multiplyBlender;
	}

	void Bitmap::differenceBlender( int r, int g, int b, int a ){
	globalBlend.red = r;
	globalBlend.green = g;
	globalBlend.blue = b;
	globalBlend.alpha = a;
	globalBlend.currentBlender = Graphics::differenceBlender;
	}

	void Bitmap::burnBlender(int r, int g, int b, int a){
	globalBlend.red = r;
	globalBlend.green = g;
	globalBlend.blue = b;
	globalBlend.alpha = a;
	globalBlend.currentBlender = Graphics::burnBlender;
	}

	int setGfxModeText(){
	/* TODO */
	return 0;
	}

	int setGfxModeFullscreen(int x, int y){
	return setGraphicsMode(FULLSCREEN, x, y);
	}

	int setGfxModeWindowed( int x, int y ){
	return setGraphicsMode(WINDOWED, x, y);
	}

	/*
	void Bitmap::drawingMode(int type){
	Graphics::drawingMode = type;
	}
	*/

	void Bitmap::alphaBlender(int source, int dest){
	globalBlend.red = 0;
	globalBlend.green = 0;
	globalBlend.blue = 0;
	/* Shove values into alpha */
	if (source > 255){
	source = 255;
	}
	if (dest > 255){
	dest = 255;
	}
	globalBlend.alpha = ((source & 0xff) << 8) + (dest & 0xff);
	globalBlend.currentBlender = Graphics::alphaBlender;
	}

	void Bitmap::transBlender( int r, int g, int b, int a ){
	globalBlend.red = r;
	globalBlend.green = g;
	globalBlend.blue = b;
	globalBlend.alpha = a;
	globalBlend.currentBlender = Graphics::transBlender;
	}

	void Bitmap::setClipRect( int x1, int y1, int x2, int y2 ) const {
	SDL_Rect area;
	area.x = x1;
	area.y = y1;
	area.w = x2 - x1;
	area.h = y2 - y1;
	SDL_SetClipRect(getData()->getSurface(), &area);
	SDL_GetClipRect(getData()->getSurface(), &area);
	getData()->setClip(area.x, area.y, area.x + area.w, area.y + area.h);
	}

	void Bitmap::getClipRect(int & x1, int & y1, int & x2, int & y2) const {
	const Util::ReferenceCount<BitmapData> & data = getData();
	x1 = data->clip_left;
	y1 = data->clip_top;
	x2 = data->clip_right;
	y2 = data->clip_bottom;
	}

	static void doPutPixel(SDL_Surface * surface, int x, int y, int pixel, bool translucent){

	if (SDL_MUSTLOCK(surface)){
	SDL_LockSurface(surface);
	}

	int bpp = surface->format->BytesPerPixel;
	/* Here p is the address to the pixel we want to set */
	Uint8 *p = computeOffset(surface, x, y);

	switch(bpp) {
	case 1:
	*p = pixel;
	break;

	case 2:
	if (translucent){
	(Uint16 )p = globalBlend.currentBlender(pixel, (Uint16)p, globalBlend.alpha);
	} else {
	(Uint16 )p = pixel;
	}
	break;
	case 3:
	if(SDL_BYTEORDER == SDL_BIG_ENDIAN) {
	p[0] = (pixel >> 16) & 0xff;
	p[1] = (pixel >> 8) & 0xff;
	p[2] = pixel & 0xff;
	} else {
	p[0] = pixel & 0xff;
	p[1] = (pixel >> 8) & 0xff;
	p[2] = (pixel >> 16) & 0xff;
	}
	break;
	case 4:
	(Uint32 )p = pixel;
	break;
	}

	if (SDL_MUSTLOCK(surface)){
	SDL_UnlockSurface(surface);
	}

	}

	void Bitmap::putPixel(int x, int y, Color pixel) const {
	/* clip it */
	if (getData()->isClipped(x, y)){
	return;
	}

	SDL_Surface * surface = getData()->getSurface();
	doPutPixel(surface, x, y, pixel.color, false);
	}

	void Bitmap::putPixelNormal(int x, int y, Color col) const {
	putPixel(x, y, col);
	}

	void TranslucentBitmap::putPixelNormal(int x, int y, Color color) const {
	if (getData()->isClipped(x, y)){
	return;
	}

	SDL_Surface * surface = getData()->getSurface();
	doPutPixel(surface, x, y, color.color, true);
	}

	bool Bitmap::getError(){
	/* TODO */
	return false;
	}

	void Bitmap::rectangle( int x1, int y1, int x2, int y2, Color color) const {
	SPG_Rect(getData()->getSurface(), x1, y1, x2, y2, color.color);
	}

	void TranslucentBitmap::rectangle( int x1, int y1, int x2, int y2, Color color) const {
	int alpha = globalBlend.alpha;
	SPG_RectBlend(getData()->getSurface(), x1, y1, x2, y2, color.color, alpha);
	}

	void Bitmap::rectangleFill( int x1, int y1, int x2, int y2, Color color) const {
	SPG_RectFilled(getData()->getSurface(), x1, y1, x2, y2, color.color);
	}

	void TranslucentBitmap::rectangleFill(int x1, int y1, int x2, int y2, Color color) const {
	int alpha = globalBlend.alpha;
	SPG_RectFilledBlend(getData()->getSurface(), x1, y1, x2, y2, color.color, alpha);
	}

	void TranslucentBitmap::ellipseFill( int x, int y, int rx, int ry, Color color) const {
	int alpha = globalBlend.alpha;
	SPG_EllipseFilledBlend(getData()->getSurface(), x, y, rx, ry, color.color, alpha);
	}

	void Bitmap::circleFill(int x, int y, int radius, Color color) const {
	SPG_CircleFilled(getData()->getSurface(), x, y, radius, color.color);

	/*
	if (Graphics::drawingMode == MODE_SOLID){
	SPG_CircleFilled(getData().getSurface(), x, y, radius, color);
	} else if (Graphics::drawingMode == MODE_TRANS){
	int alpha = globalBlend.alpha;
	SPG_CircleFilledBlend(getData().getSurface(), x, y, radius, color, alpha);
	}
	*/
	}

	void TranslucentBitmap::circleFill(int x, int y, int radius, Color color) const {
	int alpha = globalBlend.alpha;
	SPG_CircleFilledBlend(getData()->getSurface(), x, y, radius, color.color, alpha);
	}

	void Bitmap::circle(int x, int y, int radius, Color color) const {
	// Uint8 red, green, blue;
	// SDL_GetRGB(color, getData().getSurface()->format, &red, &green, &blue);
	// int alpha = 255;

	SPG_Circle(getData()->getSurface(), x, y, radius, color.color);
	/*
	if (Graphics::drawingMode == MODE_SOLID){
	SPG_Circle(getData()->getSurface(), x, y, radius, color);
	} else if (Graphics::drawingMode == MODE_TRANS){
	int alpha = globalBlend.alpha;
	SPG_CircleBlend(getData()->getSurface(), x, y, radius, color, alpha);
	}
	*/

	// circleRGBA(getData().getSurface(), x, y, radius, red, green, blue, alpha);
	}

	extern "C" unsigned short spg_thickness;
	void Bitmap::circle(int x, int y, int radius, int thickness, Color color) const {
	int old = spg_thickness;
	spg_thickness = thickness;
	SPG_Circle(getData()->getSurface(), x, y, radius, color.color);
	spg_thickness = old;
	}

	void Bitmap::line( const int x1, const int y1, const int x2, const int y2, const Color color) const {
	SPG_Line(getData()->getSurface(), x1, y1, x2, y2, color.color);
	/*
	if (Graphics::drawingMode == MODE_SOLID){
	SPG_Line(getData().getSurface(), x1, y1, x2, y2, color);
	} else if (Graphics::drawingMode == MODE_TRANS){
	int alpha = globalBlend.alpha;
	SPG_LineBlend(getData().getSurface(), x1, y1, x2, y2, color, alpha);
	}
	*/
	}

	void TranslucentBitmap::line(const int x1, const int y1, const int x2, const int y2, const Color color ) const {
	int alpha = globalBlend.alpha;
	SPG_LineBlend(getData()->getSurface(), x1, y1, x2, y2, color.color, alpha);
	}

	void Bitmap::draw(const int x, const int y, const Bitmap & where) const {
	if (getData()->getSurface() != NULL){
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_NORMAL, SPRITE_NO_FLIP, NULL);
	/*
	SDL_SetColorKey(getData().getSurface(), SDL_SRCCOLORKEY, makeColor(255, 0, 255));
	Blit(x, y, where);
	*/
	}
	}

	void Bitmap::drawHFlip(const int x, const int y, const Bitmap & where) const {
	paintown_draw_sprite_ex16( where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_NORMAL, SPRITE_H_FLIP, NULL);
	}

	void Bitmap::drawHFlip(const int x, const int y, Filter * filter, const Bitmap & where) const {
	paintown_draw_sprite_ex16( where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_NORMAL, SPRITE_H_FLIP, filter);
	}

	void Bitmap::drawVFlip( const int x, const int y, const Bitmap & where ) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_NORMAL, SPRITE_V_FLIP, NULL);
	}

	void Bitmap::drawVFlip( const int x, const int y, Filter * filter, const Bitmap & where ) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_NORMAL, SPRITE_V_FLIP, filter);
	}

	void Bitmap::drawHVFlip( const int x, const int y, const Bitmap & where ) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_NORMAL, SPRITE_V_FLIP \| SPRITE_H_FLIP, NULL);
	}

	void Bitmap::drawHVFlip( const int x, const int y, Filter * filter, const Bitmap & where ) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_NORMAL, SPRITE_V_FLIP \| SPRITE_H_FLIP, filter);
	}

	void TranslucentBitmap::draw(const int x, const int y, const Bitmap & where) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_TRANS, SPRITE_NO_FLIP, NULL);
	}

	void TranslucentBitmap::draw( const int x, const int y, Filter * filter, const Bitmap & where ) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_TRANS, SPRITE_NO_FLIP, filter);
	}

	void TranslucentBitmap::drawHFlip( const int x, const int y, const Bitmap & where ) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_TRANS, SPRITE_H_FLIP, NULL);
	}

	void TranslucentBitmap::drawHFlip( const int x, const int y, Filter * filter, const Bitmap & where ) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_TRANS, SPRITE_H_FLIP, filter);
	}

	void TranslucentBitmap::drawVFlip( const int x, const int y, const Bitmap & where ) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_TRANS, SPRITE_V_FLIP, NULL);
	}

	void TranslucentBitmap::drawVFlip( const int x, const int y, Filter * filter, const Bitmap & where ) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_TRANS, SPRITE_V_FLIP, filter);
	}

	void TranslucentBitmap::drawHVFlip( const int x, const int y, const Bitmap & where ) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_TRANS, SPRITE_V_FLIP \| SPRITE_H_FLIP, NULL);
	}

	void TranslucentBitmap::drawHVFlip( const int x, const int y, Filter * filter,const Bitmap & where ) const {
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_TRANS, SPRITE_V_FLIP \| SPRITE_H_FLIP, filter);
	}

	void Bitmap::drawStretched( const int x, const int y, const int new_width, const int new_height, const Bitmap & who ) const {

	if (getData()->getSurface() != NULL){
	SDL_SetColorKey(getData()->getSurface(), SDL_SRCCOLORKEY, MaskColor().color);

	SDL_Surface * src = getData()->getSurface();
	SDL_Surface * dst = who.getData()->getSurface();

	int myWidth = src->w;
	int myHeight = src->h;
	int hisWidth = new_width;
	int hisHeight = new_height;
	int useX = x;
	int useY = y;
	int myX = 0;
	int myY = 0;

	float xscale = (float) hisWidth / (float) myWidth;
	float yscale = (float) hisHeight / (float) myHeight;

	/* sprig wont do the clipping right, if you start drawing from a negative offset
	* sprig will do nothing.
	*/
	if (useX < 0){
	useX = 0;
	myX = -x / xscale;
	}

	if (useY < 0){
	useY = 0;
	myY = -y / yscale;
	}

	SPG_TransformX(src, dst, 0, xscale, yscale, myX, myY, useX, useY, SPG_TCOLORKEY);
	}
	}

	static void doBlit(SDL_Surface * mine, const int mx, const int my, const int width, const int height, const int wx, const int wy, const Bitmap & where ){
	SDL_Rect source;
	SDL_Rect destination;
	source.w = width;
	source.h = height;
	source.x = mx;
	source.y = my;

	destination.w = width;
	destination.h = height;
	destination.x = wx;
	destination.y = wy;

	SDL_BlitSurface(mine, &source, where.getData()->getSurface(), &destination);
	}

	void Bitmap::Blit( const int mx, const int my, const int width, const int height, const int wx, const int wy, const Bitmap & where ) const {
	SDL_SetColorKey(getData()->getSurface(), 0, MaskColor().color);
	doBlit(getData()->getSurface(), mx, my, width, height, wx, wy, where);

	/* FIXME: this is a hack, maybe put a call here for the other bitmap to update stuff
	* like where->Blitted()
	*/
	if (&where == Screen){
	SDL_Flip(Screen->getData()->getSurface());
	}
	}

	void Bitmap::BlitMasked( const int mx, const int my, const int width, const int height, const int wx, const int wy, const Bitmap & where ) const {
	SDL_SetColorKey(getData()->getSurface(), SDL_SRCCOLORKEY, MaskColor().color);

	doBlit(getData()->getSurface(),mx, my, width, height, wx, wy, where);

	/* FIXME: this is a hack, maybe put a call here for the other bitmap to update stuff
	* like where->Blitted()
	*/
	if (&where == Screen){
	SDL_Flip(Screen->getData()->getSurface());
	}
	}

	void Bitmap::BlitToScreen(const int upper_left_x, const int upper_left_y) const {
	#if 0
	if (getWidth() != Screen->getWidth() \|\| getHeight() != Screen->getHeight()){
	/*
	this->Blit( upper_left_x, upper_left_y, *Buffer );
	Buffer->Stretch(*Scaler);
	Scaler->Blit(0, 0, 0, 0, *Screen);
	*/

	this->Stretch(*Scaler, 0, 0, getWidth(), getHeight(), upper_left_x, upper_left_y, Scaler->getWidth(), Scaler->getHeight());
	Scaler->Blit(0, 0, 0, 0, *Screen);
	} else {
	this->Blit( upper_left_x, upper_left_y, *Screen );
	}
	#endif
	this->Blit(upper_left_x, upper_left_y, *Screen);

	/*
	if ( Scaler == NULL ){
	this->Blit( upper_left_x, upper_left_y, *Screen );
	} else {
	this->Blit( upper_left_x, upper_left_y, *Buffer );
	Buffer->Stretch(*Scaler);
	Scaler->Blit(0, 0, 0, 0, *Screen);
	}
	*/

	// SDL_Flip(Screen->getData().getSurface());
	// SDL_UpdateRect(Screen->getData().getSurface(), 0, 0, Screen->getWidth(), Screen->getHeight());
	}

	void Bitmap::BlitAreaToScreen(const int upper_left_x, const int upper_left_y) const {
	this->Blit(upper_left_x, upper_left_y, *Screen);
	#if 0
	if (Scaler != NULL && false){
	/*
	double mult_x = (double) Scaler->getWidth() / (double) SCALE_X;
	double mult_y = (double) Scaler->getHeight() / (double) SCALE_Y;
	*/

	double mult_x = 1;
	double mult_y = 1;

	int x = (int)(upper_left_x * mult_x);
	int y = (int)(upper_left_y * mult_y);
	int w = (int)(this->getWidth() * mult_x);
	int h = (int)(this->getHeight() * mult_y);

	// printf("ux %d uy %d uw %d uh %d. x %d y %d w %d h %d\n", upper_left_x, upper_left_y, getWidth(), getHeight(), x, y, w, h );

	this->Stretch( *Scaler, 0, 0, this->getWidth(), this->getHeight(), x, y, w, h );

	Bitmap tmp(*Scaler, x, y, w, h );
	tmp.Blit( x, y, *Screen );

	// Scaler->Blit( x, y, w, h, *Screen );
	} else {
	this->Blit(upper_left_x, upper_left_y, *Screen);
	}
	#endif
	}

	/*
	void Bitmap::Stretch( const Bitmap & where ) const {
	if (getWidth() == where.getWidth() && getHeight() == where.getHeight()){
	Blit(where);
	} else {
	Stretch(where, 0, 0, getWidth(), getHeight(), 0, 0, where.getWidth(), where.getHeight());
	}
	}
	*/

	void Bitmap::StretchXbr(const Bitmap & where, const int sourceX, const int sourceY, const int sourceWidth, const int sourceHeight, const int destX, const int destY, const int destWidth, const int destHeight) const {
	Bitmap subSource(*this, sourceX, sourceY, sourceWidth, sourceHeight);
	Bitmap subDestination(where, destX, destY, destWidth, destHeight);

	SDL_Surface * source = subSource.getData()->getSurface();
	SDL_Surface * destination = subDestination.getData()->getSurface();

	if (SDL_MUSTLOCK(source)){
	SDL_LockSurface(source);
	}

	if (SDL_MUSTLOCK(destination)){
	SDL_LockSurface(destination);
	}

	if (sourceWidth * 4 == destWidth && sourceHeight * 4 == destHeight){
	xbr::xbr4x(source, destination);
	} else if (sourceWidth * 3 == destWidth && sourceHeight * 3 == destHeight){
	xbr::xbr3x(source, destination);
	} else if (sourceWidth * 2 == destWidth && sourceHeight * 2 == destHeight){
	xbr::xbr2x(source, destination);
	} else {
	if (SDL_MUSTLOCK(source)){
	SDL_UnlockSurface(source);
	}

	if (SDL_MUSTLOCK(destination)){
	SDL_UnlockSurface(destination);
	}
	subSource.Stretch(subDestination);
	return;
	}

	if (SDL_MUSTLOCK(source)){
	SDL_UnlockSurface(source);
	}

	if (SDL_MUSTLOCK(destination)){
	SDL_UnlockSurface(destination);
	}
	}

	void Bitmap::StretchHqx(const Bitmap & where, const int sourceX, const int sourceY, const int sourceWidth, const int sourceHeight, const int destX, const int destY, const int destWidth, const int destHeight) const {
	Bitmap subSource(*this, sourceX, sourceY, sourceWidth, sourceHeight);
	Bitmap subDestination(where, destX, destY, destWidth, destHeight);

	SDL_Surface * source = subSource.getData()->getSurface();
	SDL_Surface * destination = subDestination.getData()->getSurface();

	if (SDL_MUSTLOCK(source)){
	SDL_LockSurface(source);
	}

	if (SDL_MUSTLOCK(destination)){
	SDL_LockSurface(destination);
	}

	if (sourceWidth * 4 == destWidth && sourceHeight * 4 == destHeight){
	hqx::hq4x(source, destination);
	} else if (sourceWidth * 3 == destWidth && sourceHeight * 3 == destHeight){
	hqx::hq3x(source, destination);
	} else if (sourceWidth * 2 == destWidth && sourceHeight * 2 == destHeight){
	hq2x::hq2x(source, destination);
	} else {
	if (SDL_MUSTLOCK(source)){
	SDL_UnlockSurface(source);
	}

	if (SDL_MUSTLOCK(destination)){
	SDL_UnlockSurface(destination);
	}
	subSource.Stretch(subDestination);
	return;
	}

	if (SDL_MUSTLOCK(source)){
	SDL_UnlockSurface(source);
	}

	if (SDL_MUSTLOCK(destination)){
	SDL_UnlockSurface(destination);
	}
	}

	void Bitmap::Stretch( const Bitmap & where, const int sourceX, const int sourceY, const int sourceWidth, const int sourceHeight, const int destX, const int destY, const int destWidth, const int destHeight ) const {

	/* TODO: if souceWidth == destWidth && souceHeight == destHeight then
	* just do a normal blit. check if sdl already does this optimization
	*/

	if (destWidth <= 0 \|\| destHeight <= 0 \|\|
	sourceWidth <= 0 \|\| sourceHeight <= 0){
	return;
	}

	Bitmap subSource(*this, sourceX, sourceY, sourceWidth, sourceHeight);
	Bitmap subDestination(where, destX, destY, destWidth, destHeight);

	SDL_Surface * src = subSource.getData()->getSurface();
	SDL_Surface * dst = subDestination.getData()->getSurface();

	if (SDL_MUSTLOCK(src)){
	SDL_LockSurface(src);
	}

	if (SDL_MUSTLOCK(dst)){
	SDL_LockSurface(dst);
	}

	SDL_StretchSurfaceRect(src, NULL, dst, NULL);

	if (SDL_MUSTLOCK(src)){
	SDL_UnlockSurface(src);
	}

	if (SDL_MUSTLOCK(dst)){
	SDL_UnlockSurface(dst);
	}

	/*
	SDL_Surface * src = getData().getSurface();
	SDL_Surface * dst = where.getData().getSurface();
	*/

	/*
	float xscale = (float) destWidth / (float) sourceWidth;
	float yscale = (float) destHeight / (float) sourceHeight;
	SDL_SetColorKey(src, 0, MaskColor());
	SPG_TransformX(src, dst, 0, xscale, yscale, sourceX, sourceY, destX, destY, SPG_NONE);
	*/

	/*
	SDL_Rect source;
	SDL_Rect destination;
	source.x = sourceX;
	source.y = sourceY;
	source.w = sourceWidth;
	source.h = sourceHeight;

	destination.x = destX;
	destination.y = destY;
	destination.w = destWidth;
	destination.h = destHeight;

	// SDL_StretchSurfaceRect(getData().getSurface(), &source, where.getData().getSurface(), &destination);

	SDL_Surface * src = getData().getSurface();
	SDL_Surface * dst = where.getData().getSurface();

	if (SDL_MUSTLOCK(src)){
	SDL_LockSurface(src);
	}

	if (SDL_MUSTLOCK(dst)){
	SDL_LockSurface(dst);
	}

	SDL_StretchSurfaceRect(src, &source, dst, &destination);

	if (SDL_MUSTLOCK(src)){
	SDL_UnlockSurface(src);
	}

	if (SDL_MUSTLOCK(dst)){
	SDL_UnlockSurface(dst);
	}
	*/
	}

	void Bitmap::save(const std::string & str) const {
	/* always saves as a png for now */
	IMG_SavePNG(str.c_str(), getData()->getSurface(), IMG_COMPRESS_DEFAULT);
	}

	void Bitmap::triangle( int x1, int y1, int x2, int y2, int x3, int y3, Color color ) const {

	SPG_TrigonFilled(getData()->getSurface(), x1, y1, x2, y2, x3, y3, color.color);
	/*
	if (Graphics::drawingMode == MODE_SOLID){
	SPG_TrigonFilled(getData()->getSurface(), x1, y1, x2, y2, x3, y3, color);
	} else if (Graphics::drawingMode == MODE_TRANS){
	int alpha = globalBlend.alpha;
	SPG_TrigonFilledBlend(getData()->getSurface(), x1, y1, x2, y2, x3, y3, color, alpha);
	}
	*/
	}

	void Bitmap::ellipse( int x, int y, int rx, int ry, Color color ) const {
	SPG_Ellipse(getData()->getSurface(), x, y, rx, ry, color.color);
	/*
	if (Graphics::drawingMode == MODE_SOLID){
	SPG_Ellipse(getData()->getSurface(), x, y, rx, ry, color);
	} else if (Graphics::drawingMode == MODE_TRANS){
	int alpha = globalBlend.alpha;
	SPG_EllipseBlend(getData()->getSurface(), x, y, rx, ry, color, alpha);
	}
	*/
	}

	void TranslucentBitmap::ellipse( int x, int y, int rx, int ry, Color color ) const {
	int alpha = globalBlend.alpha;
	SPG_EllipseBlend(getData()->getSurface(), x, y, rx, ry, color.color, alpha);
	}

	void Bitmap::ellipseFill( int x, int y, int rx, int ry, Color color ) const {
	SPG_EllipseFilled(getData()->getSurface(), x, y, rx, ry, color.color);
	}

	void Bitmap::light(int x, int y, int width, int height, int start_y, int focus_alpha, int edge_alpha, Color focus_color, Color edge_color) const {
	paintown_light16(getData()->getSurface(), x, y, width, height, start_y, focus_alpha, edge_alpha, focus_color.color, edge_color.color);
	}

	void Bitmap::applyTrans(const Color color) const {
	paintown_applyTrans16(getData()->getSurface(), color.color);
	}

	void Bitmap::floodfill( const int x, const int y, const Color color ) const {
	SPG_FloodFill(getData()->getSurface(), x, y, color.color);
	}

	/*
	void Bitmap::horizontalLine( const int x1, const int y, const int x2, const int color ) const {
	SPG_LineH(getData().getSurface(), x1, y, x2, color);
	}
	*/

	void Bitmap::hLine( const int x1, const int y, const int x2, const Color color ) const {
	SPG_LineH(getData()->getSurface(), x1, y, x2, color.color);
	}

	void TranslucentBitmap::hLine( const int x1, const int y, const int x2, const Color color ) const {
	int alpha = globalBlend.alpha;
	SPG_LineHBlend(getData()->getSurface(), x1, y, x2, color.color, alpha);
	}

	void Bitmap::vLine( const int y1, const int x, const int y2, const Color color ) const {
	SPG_LineV(getData()->getSurface(), x, y1, y2, color.color);
	}

	void Bitmap::polygon( const int * verts, const int nverts, const Color color ) const {
	SPG_Point * points = new SPG_Point[nverts];
	for (int i = 0; i < nverts; i++){
	points[i].x = verts[i*2];
	points[i].y = verts[i*2+1];
	}
	SPG_PolygonFilled(getData()->getSurface(), nverts, points, color.color);
	delete[] points;
	}

	static const double RAD_TO_DEG = 180.0/Util::pi;
	static const double DEG_TO_RAD = Util::pi/180.0;

	static double toDegrees(double radians){
	return RAD_TO_DEG * radians;
	}

	static const double arcPhase = -Util::pi / 2;

	/* 0 = right. pi/2 = up. pi = left. 3pi/2 = down */
	void Bitmap::arc(const int x, const int y, const double ang1, const double ang2, const int radius, const Color color ) const {
	SPG_Arc(getData()->getSurface(), x, y, radius, toDegrees(ang1 + arcPhase), toDegrees(ang2 + arcPhase), color.color);
	}

	void Bitmap::arcFilled(const int x, const int y, const double ang1, const double ang2, const int radius, const Color color ) const {
	SPG_ArcFilled(getData()->getSurface(), x, y, radius, toDegrees(ang1 + arcPhase), toDegrees(ang2 + arcPhase), color.color);
	}

	void TranslucentBitmap::arc(const int x, const int y, const double ang1, const double ang2, const int radius, const Color color ) const {
	int alpha = globalBlend.alpha;
	SPG_ArcBlend(getData()->getSurface(), x, y, radius, toDegrees(ang1 + arcPhase), toDegrees(ang2 + arcPhase), color.color, alpha);
	}

	void TranslucentBitmap::arcFilled(const int x, const int y, const double ang1, const double ang2, const int radius, const Color color ) const {
	int alpha = globalBlend.alpha;
	SPG_ArcFilledBlend(getData()->getSurface(), x, y, radius, toDegrees(ang1 + arcPhase), toDegrees(ang2 + arcPhase), color.color, alpha);
	}

	void Bitmap::fill(Color color) const {
	SDL_Rect area;
	area.x = 0;
	area.y = 0;
	area.w = getWidth();
	area.h = getHeight();
	SDL_FillRect(getData()->getSurface(), &area, color.color);
	}

	/*
	void TranslucentBitmap::fill(int color) const {
	rectangleFill(0, 0, getWidth(), getHeight(), color);
	}
	*/



	void Bitmap::drawCharacter( const int x, const int y, const Color color, const int background, const Bitmap & where ) const {
	/* TODO */
	}

	void Bitmap::drawRotate( const int x, const int y, const int angle, const Bitmap & where ){
	SDL_SetColorKey(getData()->getSurface(), SDL_SRCCOLORKEY, MaskColor().color);
	SDL_Surface * src = getData()->getSurface();
	SDL_Surface * dst = where.getData()->getSurface();
	SPG_TransformX(src, dst, angle, 1, 1, 0, 0, x, y, SPG_TCOLORKEY);
	}

	/* I'm not really sure whats going on here but we need to negate the angle */
	static int fixAngle(int angle){
	return -angle;
	}

	void Bitmap::drawPivot( const int centerX, const int centerY, const int x, const int y, const int angle, const Bitmap & where ){
	SDL_SetColorKey(getData()->getSurface(), SDL_SRCCOLORKEY, MaskColor().color);
	SDL_Surface * src = getData()->getSurface();
	SDL_Surface * dst = where.getData()->getSurface();
	SPG_TransformX(src, dst, fixAngle(angle), 1, 1, centerX, centerY, x, y, SPG_TCOLORKEY);
	}

	void Bitmap::drawPivot( const int centerX, const int centerY, const int x, const int y, const int angle, const double scale, const Bitmap & where ){
	SDL_SetColorKey(getData()->getSurface(), SDL_SRCCOLORKEY, MaskColor().color);
	SDL_Surface * src = getData()->getSurface();
	SDL_Surface * dst = where.getData()->getSurface();
	SPG_TransformX(src, dst, angle, scale, scale, centerX, centerY, x, y, SPG_TCOLORKEY);
	}

	void Bitmap::replaceColor(const Color & original, const Color & replaced){
	paintown_replace16(getData()->getSurface(), original.color, replaced.color);
	}

	static SDL_Color pcxMaskColor(unsigned char * data, const int length){
	if (length >= 769){
	if (data[length - 768 - 1] == 12){
	unsigned char * palette = &data[length - 768];
	unsigned char red = palette[0];
	unsigned char green = palette[1];
	unsigned char blue = palette[2];
	SDL_Color color;
	color.r = red;
	color.g = green;
	color.b = blue;
	return color;
	}
	}
	SDL_Color color;
	color.r = 255;
	color.g = 255;
	color.b = 255;
	return color;
	}

	struct PCXheader {
	Uint8 Manufacturer;
	Uint8 Version;
	Uint8 Encoding;
	Uint8 BitsPerPixel;
	Sint16 Xmin, Ymin, Xmax, Ymax;
	Sint16 HDpi, VDpi;
	Uint8 Colormap[48];
	Uint8 Reserved;
	Uint8 NPlanes;
	Sint16 BytesPerLine;
	Sint16 PaletteInfo;
	Sint16 HscreenSize;
	Sint16 VscreenSize;
	Uint8 Filler[54];
	};

	static SDL_Surface * fast_load_pcx(unsigned char * const memory, const unsigned int length){
	int start;
	struct PCXheader pcxh;
	Uint32 Rmask;
	Uint32 Gmask;
	Uint32 Bmask;
	Uint32 Amask;
	SDL_Surface *surface = NULL;
	int width, height;
	int y, bpl;
	Uint8 row, buf = NULL;
	const char *error = NULL;
	int bits, src_bits;
	Uint8 * data = memory;

	if (length < sizeof(pcxh)){
	goto done;
	}

	memcpy(&pcxh, data, sizeof(pcxh));
	data += sizeof(pcxh);

	pcxh.Xmin = SDL_SwapLE16(pcxh.Xmin);
	pcxh.Ymin = SDL_SwapLE16(pcxh.Ymin);
	pcxh.Xmax = SDL_SwapLE16(pcxh.Xmax);
	pcxh.Ymax = SDL_SwapLE16(pcxh.Ymax);
	pcxh.BytesPerLine = SDL_SwapLE16(pcxh.BytesPerLine);

	/* Create the surface of the appropriate type */
	width = (pcxh.Xmax - pcxh.Xmin) + 1;
	height = (pcxh.Ymax - pcxh.Ymin) + 1;
	Rmask = Gmask = Bmask = Amask = 0;
	src_bits = pcxh.BitsPerPixel * pcxh.NPlanes;
	if((pcxh.BitsPerPixel == 1 && pcxh.NPlanes >= 1 && pcxh.NPlanes <= 4)
	\|\| (pcxh.BitsPerPixel == 8 && pcxh.NPlanes == 1)) {
	bits = 8;
	} else if(pcxh.BitsPerPixel == 8 && pcxh.NPlanes == 3) {
	bits = 24;
	if (SDL_BYTEORDER == SDL_LIL_ENDIAN){
	Rmask = 0x000000FF;
	Gmask = 0x0000FF00;
	Bmask = 0x00FF0000;
	} else {
	Rmask = 0xFF0000;
	Gmask = 0x00FF00;
	Bmask = 0x0000FF;
	}
	} else {
	error = "unsupported PCX format";
	goto done;
	}
	surface = SDL_AllocSurface(SDL_SWSURFACE, width, height,
	bits, Rmask, Gmask, Bmask, Amask);
	if ( surface == NULL )
	goto done;

	bpl = pcxh.NPlanes * pcxh.BytesPerLine;
	if (bpl > surface->pitch) {
	error = "bytes per line is too large (corrupt?)";
	}
	buf = (Uint8*) malloc(bpl);
	row = (Uint8*) surface->pixels;
	for ( y=0; y<surface->h; ++y ) {
	/* decode a scan line to a temporary buffer first */
	int i, count = 0;
	Uint8 *dst = (src_bits == 8) ? row : buf;
	if (pcxh.Encoding == 0){
	if (bpl + data - memory < length){
	memcpy(dst, data, bpl);
	data += bpl;
	} else {
	error = "file truncated";
	goto done;
	}
	} else {
	Uint8 ch = 0;
	for (i = 0; i < bpl; i++) {
	if (!count) {
	if (data - memory >= length){
	error = "file truncated";
	goto done;
	} else {
	ch = *data;
	data += 1;
	}

	if ((ch & 0xc0) == 0xc0){
	count = ch & 0x3f;
	if (data - memory >= length){
	error = "file truncated";
	goto done;
	} else {
	ch = *data;
	data += 1;
	}
	} else
	count = 1;
	}
	dst[i] = ch;
	count--;
	}
	}

	if (src_bits <= 4){
	/* expand planes to 1 byte/pixel */
	Uint8 *src = buf;
	int plane;
	for(plane = 0; plane < pcxh.NPlanes; plane++) {
	int i, j, x = 0;
	for(i = 0; i < pcxh.BytesPerLine; i++) {
	Uint8 byte = *src++;
	for(j = 7; j >= 0; j--) {
	unsigned bit = (byte >> j) & 1;
	/* skip padding bits */
	if (i * 8 + j >= width)
	continue;
	row[x++] \|= bit << plane;
	}
	}
	}
	} else if(src_bits == 24) {
	/* de-interlace planes */
	Uint8 *src = buf;
	int plane;
	for(plane = 0; plane < pcxh.NPlanes; plane++) {
	int x;
	dst = row + plane;
	for(x = 0; x < width; x++) {
	dst = src++;
	dst += pcxh.NPlanes;
	}
	}
	}

	row += surface->pitch;
	}

	if(bits == 8) {
	SDL_Color *colors = surface->format->palette->colors;
	int nc = 1 << src_bits;
	int i;

	surface->format->palette->ncolors = nc;
	if(src_bits == 8) {
	/* look for a 256-colour palette */
	while (data - memory < length && *data != 12){
	data += 1;
	}
	data += 1;

	if (data - memory >= length){
	goto done;
	}

	for (i = 0; i < 256; i++) {
	colors[i].r = *data; data += 1;
	colors[i].g = *data; data += 1;
	colors[i].b = *data; data += 1;
	}
	} else {
	for(i = 0; i < nc; i++) {
	colors[i].r = pcxh.Colormap[i * 3];
	colors[i].g = pcxh.Colormap[i * 3 + 1];
	colors[i].b = pcxh.Colormap[i * 3 + 2];
	}
	}
	}

	done:
	free(buf);
	if (error){
	if (surface){
	SDL_FreeSurface(surface);
	surface = NULL;
	}
	}

	return surface;
	}

	Bitmap memoryPCX(unsigned char * const data, const int length, const bool mask){
	/*
	SDL_RWops * ops = SDL_RWFromConstMem(data, length);
	SDL_Surface * pcx = IMG_LoadPCX_RW(ops);
	SDL_FreeRW(ops);
	if (!pcx){
	std::ostringstream out;
	out << "Could not load PCX file at " << (void*) data << " length " << length;
	throw BitmapException(__FILE__, __LINE__, out.str());
	}
	*/
	SDL_Surface * pcx = fast_load_pcx(data, length);
	if (pcx == NULL){
	std::ostringstream out;
	out << "Could not load PCX file from " << (void*) data << " length " << length;
	throw BitmapException(__FILE__, __LINE__, out.str());
	}
	SDL_Surface * display = optimizedSurface(pcx);
	Bitmap out(display, false);

	if (pcx->format->BitsPerPixel == 8){
	#if SDL_VERSION_ATLEAST(1, 3, 0)
	SDL_Color color = pcxMaskColor(data, length);
	#else
	SDL_Color color = pcx->format->palette->colors[pcx->format->colorkey];
	#endif

	Color bad = makeColor(color.r, color.g, color.b);
	out.set8BitMaskColor(bad);
	// int mask = MaskColor();
	// out.replaceColor(bad, mask);
	}

	SDL_FreeSurface(pcx);
	// SDL_FreeSurface(display);
	// out.floodfill(0, 0, makeColor(255, 0, 255));

	return out;
	}

	Color Bitmap::getPixel( const int x, const int y ) const {
	return Color(SPG_GetPixel(getData()->getSurface(), x, y));
	}

	void Bitmap::readLine( std::vector<Color> & line, int y ){
	for (int x = 0; x < getWidth(); x++){
	line.push_back(getPixel(x, y));
	}
	}

	void Bitmap::StretchBy2( const Bitmap & where ){
	/* TODO */
	}

	void Bitmap::StretchBy4( const Bitmap & where ){
	/* TODO */
	}

	void Bitmap::draw(const int x, const int y, Filter * filter, const Bitmap & where) const {
	// paintown_draw_sprite_filter_ex16(where.getData().getSurface(), getData().getSurface(), x, y, filter);
	paintown_draw_sprite_ex16(where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_NORMAL, SPRITE_NO_FLIP, filter);
	}

	void LitBitmap::draw( const int x, const int y, const Bitmap & where ) const {
	paintown_draw_sprite_ex16( where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_LIT, SPRITE_NO_FLIP, NULL);
	}

	void LitBitmap::draw( const int x, const int y, Filter * filter, const Bitmap & where ) const {
	paintown_draw_sprite_ex16( where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_LIT, SPRITE_NO_FLIP, filter);
	}

	void LitBitmap::drawHFlip( const int x, const int y, const Bitmap & where ) const {
	paintown_draw_sprite_ex16( where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_LIT, SPRITE_H_FLIP, NULL);
	}

	void LitBitmap::drawHFlip( const int x, const int y, Filter * filter, const Bitmap & where ) const {
	paintown_draw_sprite_ex16( where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_LIT, SPRITE_H_FLIP, filter);
	}

	void LitBitmap::drawVFlip( const int x, const int y, const Bitmap & where ) const {
	paintown_draw_sprite_ex16( where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_LIT, SPRITE_V_FLIP, NULL);
	}

	void LitBitmap::drawVFlip( const int x, const int y, Filter * filter, const Bitmap & where ) const {
	paintown_draw_sprite_ex16( where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_LIT, SPRITE_V_FLIP, filter);
	}

	void LitBitmap::drawHVFlip( const int x, const int y, const Bitmap & where ) const {
	paintown_draw_sprite_ex16( where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_LIT, SPRITE_V_FLIP \| SPRITE_H_FLIP, NULL);
	}

	void LitBitmap::drawHVFlip( const int x, const int y, Filter * filter, const Bitmap & where ) const {
	paintown_draw_sprite_ex16( where.getData()->getSurface(), getData()->getSurface(), x, y, SPRITE_LIT, SPRITE_V_FLIP \| SPRITE_H_FLIP, filter);
	}

	/*
	#define PAINTOWN_DLS_BLENDER BLENDER_FUNC
	#define PAINTOWN_DTS_BLENDER BLENDER_FUNC
	#define PAINTOWN_MAKE_DLS_BLENDER(a) _blender_func16
	#define PAINTOWN_MAKE_DTS_BLENDER() _blender_func16
	#define PAINTOWN_PIXEL_PTR unsigned short*
	#define PAINTOWN_OFFSET_PIXEL_PTR(p,x) ((PAINTOWN_PIXEL_PTR) (p) + (x))
	#define PAINTOWN_INC_PIXEL_PTR(p) ((p)++)
	#define PAINTOWN_INC_PIXEL_PTR_EX(p,d) ((p) += d)
	#define PAINTOWN_GET_MEMORY_PIXEL(p) (*(p))
	#define PAINTOWN_IS_SPRITE_MASK(b,c) ((unsigned long) (c) == (unsigned long) MASK_COLOR)
	#define PAINTOWN_DLSX_BLEND(b,n) ((*(b))(_blender_col_16, (n), globalBlend.alpha))
	#define PAINTOWN_GET_PIXEL(p) ((unsigned short ) (p))
	#define PAINTOWN_DTS_BLEND(b,o,n) ((*(b))((n), (o), globalBlend.alpha))
	#define PAINTOWN_PUT_PIXEL(p,c) (((unsigned short ) p) = (c))
	#define PAINTOWN_PUT_MEMORY_PIXEL(p,c) (*(p) = (c))
	#define PAINTOWN_SET_ALPHA(a) (globalBlend.alpha = (a))
	*/

	static void paintown_applyTrans16(SDL_Surface * dst, const int color){
	int y1 = 0;
	int y2 = dst->h;
	int x1 = 0;
	int x2 = dst->w - 1;

	y1 = dst->clip_rect.y;
	y2 = dst->clip_rect.y + dst->clip_rect.h;
	x1 = dst->clip_rect.x;
	x2 = dst->clip_rect.x + dst->clip_rect.w;

	int bpp = dst->format->BytesPerPixel;
	unsigned int mask = MaskColor().color;
	for (int y = y1; y < y2; y++) {
	Uint8 * sourceLine = computeOffset(dst, x1, y);

	for (int x = x2 - 1; x >= x1; sourceLine += bpp, x--) {
	unsigned long sourcePixel = (Uint16) sourceLine;
	if (!(sourcePixel == mask)){
	sourcePixel = globalBlend.currentBlender(color, sourcePixel, globalBlend.alpha);
	(Uint16 )sourceLine = sourcePixel;
	}
	}
	}
	}

	static void paintown_replace16(SDL_Surface * dst, const int original, const int replace){
	int y1 = 0;
	int y2 = dst->h;
	int x1 = 0;
	int x2 = dst->w - 1;

	y1 = dst->clip_rect.y;
	y2 = dst->clip_rect.y + dst->clip_rect.h;
	x1 = dst->clip_rect.x;
	x2 = dst->clip_rect.x + dst->clip_rect.w;

	int bpp = dst->format->BytesPerPixel;

	/* Attempted manual unrolling. Gcc can optimize the naive loop below better
	* than this unrolling attempt.
	*/
	/*
	for (int y = y1; y < y2; y += 4){
	switch (y2 - y1){
	case 1 : {
	Uint8 * source1 = computeOffset(dst, x1, y);
	for (int x = x2 - 1; x >= x1; source1 += bpp, x--) {
	unsigned long sourcePixel = (Uint16) source1;
	if ((int) sourcePixel == original){
	(Uint16 )source1 = replace;
	}
	}
	break;
	}
	case 2 : {
	Uint8 * source1 = computeOffset(dst, x1, y);
	Uint8 * source2 = computeOffset(dst, x1, y + 1);
	for (int x = x2 - 1; x >= x1; source1 += bpp, source2 += bpp, x--) {
	unsigned long sourcePixel = (Uint16) source1;
	unsigned long sourcePixel2 = (Uint16) source2;
	if ((int) sourcePixel == original){
	(Uint16 )source1 = replace;
	}
	if ((int) sourcePixel2 == original){
	(Uint16 )source2 = replace;
	}
	}
	break;
	}
	case 3 : {
	Uint8 * source1 = computeOffset(dst, x1, y);
	Uint8 * source2 = computeOffset(dst, x1, y + 1);
	Uint8 * source3 = computeOffset(dst, x1, y + 2);
	for (int x = x2 - 1; x >= x1; source1 += bpp, source2 += bpp, source3 += bpp, x--) {
	unsigned long sourcePixel = (Uint16) source1;
	unsigned long sourcePixel2 = (Uint16) source2;
	unsigned long sourcePixel3 = (Uint16) source3;
	if ((int) sourcePixel == original){
	(Uint16 )source1 = replace;
	}
	if ((int) sourcePixel2 == original){
	(Uint16 )source2 = replace;
	}
	if ((int) sourcePixel3 == original){
	(Uint16 )source3 = replace;
	}
	}
	break;
	}
	default:
	case 4 : {
	Uint8 * source1 = computeOffset(dst, x1, y);
	Uint8 * source2 = computeOffset(dst, x1, y + 1);
	Uint8 * source3 = computeOffset(dst, x1, y + 2);
	Uint8 * source4 = computeOffset(dst, x1, y + 3);
	for (int x = x2 - 1; x >= x1; source1 += bpp, source2 += bpp, source3 += bpp, source4 += bpp, x--) {
	unsigned long sourcePixel = (Uint16) source1;
	unsigned long sourcePixel2 = (Uint16) source2;
	unsigned long sourcePixel3 = (Uint16) source3;
	unsigned long sourcePixel4 = (Uint16) source4;
	if ((int) sourcePixel == original){
	(Uint16 )source1 = replace;
	}
	if ((int) sourcePixel2 == original){
	(Uint16 )source2 = replace;
	}
	if ((int) sourcePixel3 == original){
	(Uint16 )source3 = replace;
	}
	if ((int) sourcePixel4 == original){
	(Uint16 )source4 = replace;
	}
	}
	break;
	}
	}
	}
	*/
	if (SDL_MUSTLOCK(dst)){
	SDL_LockSurface(dst);
	}

	/* Another failed attempt at loop unrolling. */
	/*
	int y2_4 = y2 & (~3);

	for (int y = y1; y < y2_4; y += 4) {
	Uint8 * source1 = computeOffset(dst, x1, y);
	Uint8 * source2 = computeOffset(dst, x1, y + 1);
	Uint8 * source3 = computeOffset(dst, x1, y + 2);
	Uint8 * source4 = computeOffset(dst, x1, y + 3);
	for (int x = x2 - 1; x >= x1; source1 += bpp, source2 += bpp, source3 += bpp, source4 += bpp, x--) {
	Uint16 sourcePixel = (Uint16) source1;
	Uint16 sourcePixel2 = (Uint16) source2;
	Uint16 sourcePixel3 = (Uint16) source3;
	Uint16 sourcePixel4 = (Uint16) source4;
	if (sourcePixel == original){
	(Uint16 )source1 = replace;
	}
	if (sourcePixel2 == original){
	(Uint16 )source2 = replace;
	}
	if (sourcePixel3 == original){
	(Uint16 )source3 = replace;
	}
	if (sourcePixel4 == original){
	(Uint16 )source4 = replace;
	}
	}
	}

	for (int y = y2_4; y < y2; y++) {
	Uint8 * sourceLine = computeOffset(dst, x1, y);

	for (int x = x2 - 1; x >= x1; sourceLine += bpp, x--) {
	Uint16 sourcePixel = (Uint16) sourceLine;
	if (sourcePixel == original){
	(Uint16 )sourceLine = replace;
	}
	}
	}
	*/

	/* Original */
	for (int y = y1; y < y2; y++){
	Uint8 * sourceLine = computeOffset(dst, x1, y);

	for (int x = x2 - 1; x >= x1; sourceLine += bpp, x--) {
	Uint16 sourcePixel = (Uint16) sourceLine;
	if (sourcePixel == original){
	(Uint16 )sourceLine = replace;
	}
	}
	}

	if (SDL_MUSTLOCK(dst)){
	SDL_UnlockSurface(dst);
	}
	}

	static void paintown_draw_sprite_filter_ex16(SDL_Surface * dst, SDL_Surface * src, long long dx, long long dy, Bitmap::Filter * filter){
	int x, y, w, h;
	int x_dir = 1, y_dir = 1;
	int dxbeg, dybeg;
	int sxbeg, sybeg;

	if (SDL_MUSTLOCK(dst)){
	SDL_LockSurface(dst);
	}

	if (true /* dst->clip*/ ) {
	long long tmp;

	tmp = dst->clip_rect.x - dx;
	sxbeg = ((tmp < 0) ? 0 : tmp);
	dxbeg = sxbeg + dx;

	tmp = dst->clip_rect.x + dst->clip_rect.w - dx;
	w = ((tmp > src->w) ? src->w : tmp) - sxbeg;
	if (w <= 0)
	return;

	tmp = dst->clip_rect.y - dy;
	sybeg = ((tmp < 0) ? 0 : tmp);
	dybeg = sybeg + dy;

	tmp = dst->clip_rect.y + dst->clip_rect.h - dy;
	h = ((tmp > src->h) ? src->h : tmp) - sybeg;
	if (h <= 0)
	return;
	}

	unsigned int mask = MaskColor().color;
	int bpp = src->format->BytesPerPixel;
	for (y = 0; y < h; y++) {
	Uint8 * sourceLine = computeOffset(src, sxbeg, sybeg + y);
	Uint8 * destLine = computeOffset(dst, dxbeg, dybeg + y * y_dir);

	for (x = w - 1; x >= 0; sourceLine += bpp, destLine += bpp * x_dir, x--) {
	unsigned long sourcePixel = (Uint16) sourceLine;
	if (!(sourcePixel == mask)){
	(Uint16 )destLine = filter->filter(Color(sourcePixel)).color;
	} else {
	(Uint16 )destLine = mask;
	}
	}
	}

	if (SDL_MUSTLOCK(dst)){
	SDL_UnlockSurface(dst);
	}
	}

	static void paintown_draw_sprite_ex16(SDL_Surface * dst, SDL_Surface * src, long long dx, long long dy, int mode, int flip, Bitmap::Filter * filter){
	int x, y, w, h;
	int x_dir = 1, y_dir = 1;
	int dxbeg, dybeg;
	int sxbeg, sybeg;
	/*
	PAINTOWN_DLS_BLENDER lit_blender;
	PAINTOWN_DTS_BLENDER trans_blender;
	*/

	/*
	ASSERT(dst);
	ASSERT(src);
	*/

	if (SDL_MUSTLOCK(src)){
	SDL_LockSurface(src);
	}

	if (SDL_MUSTLOCK(dst)){
	SDL_LockSurface(dst);
	}

	if ( flip & SPRITE_V_FLIP ){
	y_dir = -1;
	}
	if ( flip & SPRITE_H_FLIP ){
	x_dir = -1;
	}

	if (true /* dst->clip*/ ) {
	long long tmp;

	tmp = dst->clip_rect.x - dx;
	sxbeg = ((tmp < 0) ? 0 : tmp);
	dxbeg = sxbeg + dx;

	tmp = dst->clip_rect.x + dst->clip_rect.w - dx;
	w = ((tmp > src->w) ? src->w : tmp) - sxbeg;
	if (w <= 0)
	return;

	if ( flip & SPRITE_H_FLIP ){
	/* use backward drawing onto dst */
	sxbeg = src->w - (sxbeg + w);
	dxbeg += w - 1;
	}

	tmp = dst->clip_rect.y - dy;
	sybeg = ((tmp < 0) ? 0 : tmp);
	dybeg = sybeg + dy;

	tmp = dst->clip_rect.y + dst->clip_rect.h - dy;
	h = ((tmp > src->h) ? src->h : tmp) - sybeg;
	if (h <= 0)
	return;

	if ( flip & SPRITE_V_FLIP ){
	/* use backward drawing onto dst */
	sybeg = src->h - (sybeg + h);
	dybeg += h - 1;
	}
	} else {
	w = src->w;
	h = src->h;
	sxbeg = 0;
	sybeg = 0;
	dxbeg = dx;
	if ( flip & SPRITE_H_FLIP ){
	dxbeg = dx + w - 1;
	}
	dybeg = dy;
	if ( flip & SPRITE_V_FLIP ){
	dybeg = dy + h - 1;
	}
	}

	/*
	lit_blender = PAINTOWN_MAKE_DLS_BLENDER(0);
	trans_blender = PAINTOWN_MAKE_DTS_BLENDER();
	*/

	#if 0
	if (dst->id & (BMP_ID_VIDEO \| BMP_ID_SYSTEM)) {
	bmp_select(dst);

	switch (mode){
	case Bitmap::SPRITE_NORMAL : {
	for (y = 0; y < h; y++) {
	PAINTOWN_PIXEL_PTR s = PAINTOWN_OFFSET_PIXEL_PTR(src->line[sybeg + y], sxbeg);
	PAINTOWN_PIXEL_PTR d = PAINTOWN_OFFSET_PIXEL_PTR(bmp_write_line(dst, dybeg + y * y_dir), dxbeg);
	for (x = w - 1; x >= 0; PAINTOWN_INC_PIXEL_PTR(s), PAINTOWN_INC_PIXEL_PTR_EX(d,x_dir), x--) {

	unsigned long c = PAINTOWN_GET_MEMORY_PIXEL(s);
	if (!PAINTOWN_IS_SPRITE_MASK(src, c)) {
	PAINTOWN_PUT_PIXEL(d, c);
	}
	}
	}

	break;
	}
	case Bitmap::SPRITE_LIT : {
	for (y = 0; y < h; y++) {
	PAINTOWN_PIXEL_PTR s = PAINTOWN_OFFSET_PIXEL_PTR(src->line[sybeg + y], sxbeg);
	PAINTOWN_PIXEL_PTR d = PAINTOWN_OFFSET_PIXEL_PTR(bmp_write_line(dst, dybeg + y * y_dir), dxbeg);
	for (x = w - 1; x >= 0; PAINTOWN_INC_PIXEL_PTR(s), PAINTOWN_INC_PIXEL_PTR_EX(d,x_dir), x--) {

	unsigned long c = PAINTOWN_GET_MEMORY_PIXEL(s);
	if (!PAINTOWN_IS_SPRITE_MASK(src, c)) {
	c = PAINTOWN_DLSX_BLEND(lit_blender, c);
	PAINTOWN_PUT_PIXEL(d, c);
	}
	}
	}
	break;
	}
	case Bitmap::SPRITE_TRANS : {
	for (y = 0; y < h; y++) {
	PAINTOWN_PIXEL_PTR s = PAINTOWN_OFFSET_PIXEL_PTR(src->line[sybeg + y], sxbeg);
	PAINTOWN_PIXEL_PTR d = PAINTOWN_OFFSET_PIXEL_PTR(bmp_write_line(dst, dybeg + y * y_dir), dxbeg);
	for (x = w - 1; x >= 0; PAINTOWN_INC_PIXEL_PTR(s), PAINTOWN_INC_PIXEL_PTR_EX(d,x_dir), x--) {

	unsigned long c = PAINTOWN_GET_MEMORY_PIXEL(s);
	if (!PAINTOWN_IS_SPRITE_MASK(src, c)) {
	c = PAINTOWN_DTS_BLEND(trans_blender, PAINTOWN_GET_PIXEL(d), c);
	PAINTOWN_PUT_PIXEL(d, c);
	}
	}
	}
	break;
	}
	}
	#xendif

	for (y = 0; y < h; y++) {
	PAINTOWN_PIXEL_PTR s = PAINTOWN_OFFSET_PIXEL_PTR(src->line[sybeg + y], sxbeg);

	/* flipped if y_dir is -1 */
	PAINTOWN_PIXEL_PTR d = PAINTOWN_OFFSET_PIXEL_PTR(bmp_write_line(dst, dybeg + y * y_dir), dxbeg);

	/* d is incremented by x_dir, -1 if flipped */
	for (x = w - 1; x >= 0; PAINTOWN_INC_PIXEL_PTR(s), PAINTOWN_INC_PIXEL_PTR_EX(d,x_dir), x--) {
	unsigned long c = PAINTOWN_GET_MEMORY_PIXEL(s);
	if (!PAINTOWN_IS_SPRITE_MASK(src, c)) {
	switch( mode ){
	case Bitmap::SPRITE_NORMAL : break;
	case Bitmap::SPRITE_LIT : {
	c = PAINTOWN_DLSX_BLEND(lit_blender, c);
	break;
	}
	case Bitmap::SPRITE_TRANS : {
	c = PAINTOWN_DTS_BLEND(trans_blender, PAINTOWN_GET_PIXEL(d), c);
	break;
	}
	}
	PAINTOWN_PUT_PIXEL(d, c);
	}
	}
	}

	bmp_unwrite_line(dst);
	}
	else {
	#endif
	{

	switch (mode){
	case SPRITE_NORMAL : {
	unsigned int mask = MaskColor().color;
	int bpp = src->format->BytesPerPixel;
	for (y = 0; y < h; y++) {
	Uint8 * sourceLine = computeOffset(src, sxbeg, sybeg + y);
	Uint8 * destLine = computeOffset(dst, dxbeg, dybeg + y * y_dir);

	for (x = w - 1; x >= 0; sourceLine += bpp, destLine += bpp * x_dir, x--) {
	unsigned long sourcePixel = (Uint16) sourceLine;
	if (!(sourcePixel == mask)){
	// unsigned int destPixel = (Uint16) destLine;
	// sourcePixel = globalBlend.currentBlender(destPixel, sourcePixel, globalBlend.alpha);
	if (filter != NULL){
	(Uint16 )destLine = filter->filter(Color(sourcePixel)).color;
	} else {
	(Uint16 )destLine = sourcePixel;
	}
	}
	}
	}
	break;
	}
	case SPRITE_LIT : {
	int bpp = src->format->BytesPerPixel;
	int litColor = makeColor(globalBlend.red, globalBlend.green, globalBlend.blue).color;
	unsigned int mask = MaskColor().color;
	for (y = 0; y < h; y++) {
	Uint8 * sourceLine = computeOffset(src, sxbeg, sybeg + y);
	Uint8 * destLine = computeOffset(dst, dxbeg, dybeg + y * y_dir);

	for (x = w - 1; x >= 0; sourceLine += bpp, destLine += bpp * x_dir, x--) {
	unsigned long sourcePixel = (Uint16) sourceLine;
	if (!(sourcePixel == mask)){
	// unsigned int destPixel = (Uint16) destLine;
	if (filter != NULL){
	sourcePixel = globalBlend.currentBlender(litColor, filter->filter(Color(sourcePixel)).color, globalBlend.alpha);
	(Uint16 )destLine = sourcePixel;
	} else {
	sourcePixel = globalBlend.currentBlender(litColor, sourcePixel, globalBlend.alpha);
	(Uint16 )destLine = sourcePixel;
	}
	}
	}
	}
	break;
	}
	case SPRITE_TRANS : {
	int bpp = src->format->BytesPerPixel;
	unsigned int mask = MaskColor().color;
	for (y = 0; y < h; y++) {
	Uint8 * sourceLine = computeOffset(src, sxbeg, sybeg + y);
	Uint8 * destLine = computeOffset(dst, dxbeg, dybeg + y * y_dir);

	for (x = w - 1; x >= 0; sourceLine += bpp, destLine += bpp * x_dir, x--) {
	unsigned long sourcePixel = (Uint16) sourceLine;
	if (!(sourcePixel == mask)){
	unsigned int destPixel = (Uint16) destLine;
	if (filter != NULL){
	sourcePixel = globalBlend.currentBlender(filter->filter(Color(sourcePixel)).color, destPixel, globalBlend.alpha);
	(Uint16 )destLine = sourcePixel;
	} else {
	sourcePixel = globalBlend.currentBlender(sourcePixel, destPixel, globalBlend.alpha);
	(Uint16 )destLine = sourcePixel;
	}
	}
	}
	}
	break;
	}
	default : { break; }
	}

	#if 0
	for (y = 0; y < h; y++) {
	PAINTOWN_PIXEL_PTR s = PAINTOWN_OFFSET_PIXEL_PTR(src->line[sybeg + y], sxbeg);
	PAINTOWN_PIXEL_PTR d = PAINTOWN_OFFSET_PIXEL_PTR(bmp_write_line(dst, dybeg + y * y_dir), dxbeg);

	for (x = w - 1; x >= 0; PAINTOWN_INC_PIXEL_PTR(s), PAINTOWN_INC_PIXEL_PTR_EX(d,x_dir), x--) {
	unsigned long c = PAINTOWN_GET_MEMORY_PIXEL(s);
	if (!PAINTOWN_IS_SPRITE_MASK(src, c)) {
	switch( mode ){
	case Bitmap::SPRITE_NORMAL : break;
	case Bitmap::SPRITE_LIT : {
	c = PAINTOWN_DLSX_BLEND(lit_blender, c);
	break;
	}
	case Bitmap::SPRITE_TRANS : {
	c = PAINTOWN_DTS_BLEND(trans_blender, PAINTOWN_GET_PIXEL(d), c);
	break;
	}
	}
	PAINTOWN_PUT_MEMORY_PIXEL(d, c);
	}
	}
	}
	#endif
	}

	if (SDL_MUSTLOCK(src)){
	SDL_UnlockSurface(src);
	}

	if (SDL_MUSTLOCK(dst)){
	SDL_UnlockSurface(dst);
	}
	}

	/* ultra special-case for drawing a light (like from a lamp).
	* center of light is x,y and shines in a perfect isosolese triangle.
	*/
	static void paintown_light16(SDL_Surface * dst, const int x, const int y, int width, int height, const int start_y, const int focus_alpha, const int edge_alpha, const int focus_color, const int edge_color){

	if (width > dst->w){
	width = dst->w;
	}

	if (height > dst->h){
	height = dst->h;
	}

	int dxbeg = x - width;
	int x_dir = 1;
	unsigned char * alphas = new unsigned char[width];
	Color * colors = new Color[width];
	for (int i = 0; i < width; i++){
	alphas[i] = (unsigned char)((double)(edge_alpha - focus_alpha) * (double)i / (double)width + focus_alpha);
	}
	blend_palette(colors, width, Color(focus_color), Color(edge_color));

	if (SDL_MUSTLOCK(dst)){
	SDL_LockSurface(dst);
	}

	int min_y, max_y, min_x, max_x;
	min_y = dst->clip_rect.y;
	max_y = dst->clip_rect.y + dst->clip_rect.h - 1;
	min_x = dst->clip_rect.x;
	max_x = dst->clip_rect.x + dst->clip_rect.w - 1;

	int dybeg = y;

	/* tan(theta) = y / x */
	double xtan = (double) height / (double) width;
	int bpp = dst->format->BytesPerPixel;
	for (int sy = start_y; sy < height; sy++) {
	if (dybeg + sy < min_y \|\| dybeg + sy > max_y){
	continue;
	}
	/* x = y / tan(theta) */
	int top_width = (int)((double) sy / xtan);
	if (top_width == 0){
	continue;
	}

	dxbeg = x - top_width;
	Uint8* line = computeOffset(dst, dxbeg, dybeg + y);

	for (int sx = -top_width; sx <= top_width; line += x_dir * bpp, sx++) {
	if (sx + x < min_x \|\| sx + x > max_x){
	continue;
	}

	unsigned long c = (Uint16) line;

	/* TODO:
	* converting to a double and calling fabs is overkill, just
	* write an integer abs() function.
	*/
	int sx_abs = (int) fabs((double) sx);
	int alphaUse = alphas[sx_abs];
	int color = colors[sx_abs].color;

	c = globalBlend.currentBlender(color, c, alphaUse);

	(Uint16) line = c;
	}
	}
	delete[] alphas;
	delete[] colors;

	if (SDL_MUSTLOCK(dst)){
	SDL_UnlockSurface(dst);
	}
	}

	}

	#include "../software-renderer/bitmap.cpp"

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